225640500 has 48 divisors (see below), whose sum is σ = 657069504. Its totient is φ = 60170400.

The previous prime is 225640489. The next prime is 225640501. The reversal of 225640500 is 5046522.

225640500 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225640501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73714 + ... + 76713.

It is an arithmetic number, because the mean of its divisors is an integer number (13688948).

Almost surely, 2^225640500 is an apocalyptic number.

225640500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225640500 is an abundant number, since it is smaller than the sum of its proper divisors (431429004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225640500 is a wasteful number, since it uses less digits than its factorization.

225640500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150449 (or 150437 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 225640500 is about 15021.3348275045. The cubic root of 225640500 is about 608.7967861757.

The spelling of 225640500 in words is "two hundred twenty-five million, six hundred forty thousand, five hundred".